Procedure: Review the summary of a published scientific study below: Patients with multiple sclerosis frequently suffer from blurred vision. Drug X was developed to reduce blurred vision in healthy patients, but the effectiveness had not been tested on those suffering from multiple sclerosis. A study was conducted to determine if Drug X is effective at reducing blurry vision in multiple sclerosis patients. To be considered effective, a drug must reduce blurred vision by more than 30% in patients. Researchers predicted that a 20 mg dose of the drug would be effective for treating blurred vision in multiple sclerosis patients by reducing blurred vision by more than 30%. Drug X was administered to groups of multiple sclerosis patients at three doses (10 mg/day, 20 mg/day, 30 mg/day) for three weeks. A fourth group of patients was given a placebo containing no drug X for the same length of time. Vision clarity was measured for each patient before and after the three-week period using a standard vision test. The results were analyzed and graphed (See Figure 2), illustrating that more patients receiving 20 mg/day of Drug X per day exhibited a higher reduction in blurred vision than did the other groups. Researchers concluded that a 20 mg dosage of Drug X was effective for treating blurred vision in patients with multiple sclerosis. The researchers then submitted their work to a medical journal where it was reviewed by a panel of vision and multiple sclerosis experts before being published. 2. Identify the hypothesis developed for the study and record in Data Table 1. 3. Identify the independent variable in the study and record in Data Table 1. 4. Identify the dependent variable in the study and record in Data Table 1. 5. Identify the control group in the study and record in Data Table 1. Were all seven steps of the scientific method referenced in the Drug X report summary in this exercise? Explain you answer by correlating each step to information provided in the report summary. Was the reported study data in this exercise qualitative or quantitative? Explain your answer by referencing the definitions of each data type.
Procedure:
- Review the summary of a published scientific study below:
Patients with multiple sclerosis frequently suffer from blurred vision. Drug X was developed to reduce blurred vision in healthy patients, but the effectiveness had not been tested on those suffering from multiple sclerosis. A study was conducted to determine if Drug X is effective at reducing blurry vision in multiple sclerosis patients. To be considered effective, a drug must reduce blurred vision by more than 30% in patients. Researchers predicted that a 20 mg dose of the drug would be effective for treating blurred vision in multiple sclerosis patients by reducing blurred vision by more than 30%. Drug X was administered to groups of multiple sclerosis patients at three doses (10 mg/day, 20 mg/day, 30 mg/day) for three weeks. A fourth group of patients was given a placebo containing no drug X for the same length of time. Vision clarity was measured for each patient before and after the three-week period using a standard vision test. The results were analyzed and graphed (See Figure 2), illustrating that more patients receiving 20 mg/day of Drug X per day exhibited a higher reduction in blurred vision than did the other groups. Researchers concluded that a 20 mg dosage of Drug X was effective for treating blurred vision in patients with multiple sclerosis. The researchers then submitted their work to a medical journal where it was reviewed by a panel of vision and multiple sclerosis experts before being published.
2. Identify the hypothesis developed for the study and record in Data Table 1.
3. Identify the independent variable in the study and record in Data Table 1.
4. Identify the dependent variable in the study and record in Data Table 1.
5. Identify the control group in the study and record in Data Table 1.
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